EP1326736B1 - Tool mounting for a hand machine tool - Google Patents

Tool mounting for a hand machine tool Download PDF

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Publication number
EP1326736B1
EP1326736B1 EP01964910A EP01964910A EP1326736B1 EP 1326736 B1 EP1326736 B1 EP 1326736B1 EP 01964910 A EP01964910 A EP 01964910A EP 01964910 A EP01964910 A EP 01964910A EP 1326736 B1 EP1326736 B1 EP 1326736B1
Authority
EP
European Patent Office
Prior art keywords
tool
locking
basic body
locating sleeve
tool mounting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP01964910A
Other languages
German (de)
French (fr)
Other versions
EP1326736A1 (en
Inventor
Otto Baumann
Helmut Heinzelmann
Hardy Schmid
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1326736A1 publication Critical patent/EP1326736A1/en
Application granted granted Critical
Publication of EP1326736B1 publication Critical patent/EP1326736B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/08—Means for retaining and guiding the tool bit, e.g. chucks allowing axial oscillation of the tool bit
    • B25D17/084—Rotating chucks or sockets
    • B25D17/088—Rotating chucks or sockets with radial movable locking elements co-operating with bit shafts specially adapted therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/17—Socket type
    • Y10T279/17042—Lost motion
    • Y10T279/17094—Sleeve type retainer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/17—Socket type
    • Y10T279/17666—Radially reciprocating jaws
    • Y10T279/17692—Moving-cam actuator
    • Y10T279/17743—Reciprocating cam sleeve
    • Y10T279/17752—Ball or roller jaws
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/94—Tool-support
    • Y10T408/95—Tool-support with tool-retaining means
    • Y10T408/953—Clamping jaws

Definitions

  • the present invention relates to a tool holder for a Flandwerkmaschine with rotating and / or beating drive, wherein the tool holder has a base body with means for receiving a.
  • Tool having a Nutenschaft the main body is equipped with at least one locking mechanism with which the tool is locked in the base body, and an actuator for unlocking the tool is provided.
  • Such a tool holder is z. B. from the DE 197 24 532 A1 or the non-prepublished German application 100 02 749.0 known.
  • the base body has a receiving bore into which the corresponding tool is inserted with its shank and can be fixed therein by means of a locking device.
  • rotary driving webs are arranged, which engage in open at the end of the tool shank grooves to ensure a rotational drive of the tool.
  • the Rotary driving strips in the receiving bore of the body are usually made by broaching or hammering.
  • the invention is therefore based on the object to provide a tool holder of the type mentioned, which is such that it can be produced on the one hand with the least possible effort and on the other hand, the wear occurring therein is minimized.
  • This measure makes it possible to produce the base body from a good machinable steel, but to choose the receiving sleeve as possible a wear-resistant hardened steel.
  • the receiving sleeve can, for. B. by swaging or extrusion or sintering or in Precision casting process made of wear-resistant steel can be produced economically.
  • the receiving sleeve is provided with at least one recess, which z. B. can be produced in a milling operation.
  • At least one rotary driving web is formed in the interior of the receiving sleeve, which engages in a groove on the tool shank.
  • This rotary strut can z. B are formed by extrusion or hammering in the receiving sleeve.
  • a particularly good frictional connection between the receiving sleeve and the base body is achieved in that the receiving sleeve is connected to the main body by brazing.
  • the base body is provided with at least one locking body, which in a shaft end of the Tool existing groove is inserted and held by a locking element in its locking position, which is feasible via the actuating element in a radially releasing the locking body position.
  • the inventive use of a wear-resistant receiving sleeve ensures a high concentricity of the tool in the tool holder.
  • FIG. 1 shows a detail of a cross section through a tool holder 10, the z. B. is arranged on a rotating and / or beating hand tool.
  • This tool holder 10 is used to hold tools with a Nutenschaft.
  • the tool holder 10 has a base body 12, in which a radially displaceable locking body, in the exemplary embodiment, a locking ball 14, is mounted.
  • This locking ball 14 is insertable into a groove on the shaft end of the tool (not shown in the drawing) and is provided by a limited axially movable locking sleeve 16 and a retaining sleeve 18 in their Locking position held.
  • the locking sleeve 16 is loaded via the retaining sleeve 18 with a compression spring 20 in the direction of its blocking position.
  • the compression spring 20 is supported on the machine body 12 on the base body. Also, the locking sleeve 16 is supported on the base body 12.
  • the locking sleeve 16 covers the locking ball 14 radially, and the retaining sleeve 18 secures the locking ball 14 in the axial direction.
  • the locking ball 14 is moved by the shaft end of the tool in a recess 22 of the base body 12 in the insertion direction of the tool.
  • the retaining sleeve 18 is displaced over the locking ball 14 against the compression spring 20, whereby a clearance is created between the locking sleeve 16 and the retaining sleeve 18, in which the locking ball 14 can escape radially outward.
  • the biased compression spring 20 moves the retaining sleeve 18 in its initial position and presses the locking ball 14 in the groove of the tool.
  • an unlocking mechanism which consists of an actuating sleeve 24 which is slidably mounted on the base body 12 in the axial direction.
  • an actuating sleeve 24 which is slidably mounted on the base body 12 in the axial direction.
  • compression spring 20 presses the retaining sleeve 18, the locking sleeve 16, the locking ball 14 and the actuating sleeve 24 in their initial positions.
  • FIG. 1 is still an anvil indicated 30, the machine side protrudes into the base body 12 and serves to put the tool in striking movements.
  • the basic body consists of manufacturing reasons of an easily machinable steel. Since such a steel would not be sufficiently wear-resistant in the receiving area for the tool, a receiving sleeve 34 made of a wear-resistant hard steel is inserted into the base body 12 in a receiving bore 32 provided for this purpose. It can be a steel that has undergone an extra hardening process.
  • the receiving sleeve 34 may, for. B. consist of HSS or 100Cr6.
  • the receiving sleeve 34 At least one rotary driving web 38 is formed, which engages in an existing at the end of the tool shank groove and thus transmits the rotational movement of the base body 12 to a rotational movement of the tool.
  • the receiving sleeve 34 is made of a hard steel with the rotary driving web, the susceptibility to wear, in particular of the rotary driving web, which is exposed to a high mechanical load, greatly reduced.
  • the recess 40 and the rotary driving bar 38 may be prior to the use of the receiving sleeve 34 in the receiving bore 32 of the base body 12 z. B. be made by milling or suitable deformation. However, the recess 40 and the driving bar 38 can also be created only when the receiving sleeve 34 is already soldered into the receiving bore 32. In this case, the recess 22 in the base body 12 and the recess 40 in the receiving sleeve 34 in one operation, for. B. by milling. Also can be made by broaching processes in the already soldered into the receiving bore 32 receiving sleeve 34 subsequently tolerance machining.
  • FIG. 2 is a variant of the embodiment in FIG. 1 shown.
  • Substantially identical components are basically numbered in the described embodiments with the same reference numerals.
  • the description of the exemplary embodiment can be found in FIG. 1 to get expelled. That in the FIG. 2 illustrated embodiment of the tool holder differs from that in the FIG. 1 illustrated embodiment in that the receiving sleeve 34 is provided at its the inlet opening for the tool end facing with a collar 42 which forms an axial stop on a frontal stop surface 44 provided on the base body 12.
  • the receiving sleeve 34 receives a particularly secure axial seat in the base body 12.
  • the stop surface 44 may be provided with a z.
  • radially encircling recess 46 are provided, in which for fixing the collar 42 on the stop surface 44, a brazing material can be introduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Gripping On Spindles (AREA)
  • Jigs For Machine Tools (AREA)
  • Drilling Tools (AREA)

Description

Stand der TechnikState of the art

Die vorliegende Erfindung betrifft eine Werkzeughalterung für eine Flandwerkzeugmaschine mit drehendem und/oder schlagendem Antrieb, wobei die Werkzeughalterung einen Grundkörper mit Mitteln zur Aufnahme eines. Werkzeugs mit einem Nutenschaft aufweist, der Grundkörper mit mindestens einem Verriegelungsmechanismus ausgestattet ist, mit dem das Werkzeug im Grundkörper arretierbar ist, und ein Betätigungselement zum Entriegeln des Werkzeugs vorgesehen ist.The present invention relates to a tool holder for a Flandwerkzeugmaschine with rotating and / or beating drive, wherein the tool holder has a base body with means for receiving a. Tool having a Nutenschaft, the main body is equipped with at least one locking mechanism with which the tool is locked in the base body, and an actuator for unlocking the tool is provided.

Eine derartige Werkzeughalterung ist z. B. aus der DE 197 24 532 A1 oder der nicht vorveröffentlichten deutschen Anmeldung 100 02 749.0 bekannt. Bei dieser bekannten Werkzeughalterung besitzt der Grundkörper eine Aufnahmebohrung, in die das entsprechende Werkzeug mit seinem Schaft eingesetzt wird und darin mittels einer Verriegelungsvorrichtung fixiert werden kann. In der Aufnahmebohrung des Grundkörpers sind sogenannte Drehmitnahmestege anbeordnet, welche in am Ende des Werkzeugschaftes offene Nuten eingreifen, um eine Drehmitnahme des Werkzeuges zu gewährleisten. Die Drehmitnahmeleisten in der Aufnahmebohrung des Grundkörpers werden üblicherweise durch Räumen oder Hämmern hergestellt.Such a tool holder is z. B. from the DE 197 24 532 A1 or the non-prepublished German application 100 02 749.0 known. In this known tool holder, the base body has a receiving bore into which the corresponding tool is inserted with its shank and can be fixed therein by means of a locking device. In the receiving bore of the main body so-called rotary driving webs are arranged, which engage in open at the end of the tool shank grooves to ensure a rotational drive of the tool. The Rotary driving strips in the receiving bore of the body are usually made by broaching or hammering.

Es besteht einerseits die Forderung nach einer einfachen, kostengünstigen Herstellbarkeit der Werkzeughalterung und andererseits die Forderung nach einem geringen Verschleiß. Erfahrungsgemäß verschleißen Werkzeughalterungen vornehmlich im Bereich der Drehmitnahmestege und in der Werkzeugführung in Folge der Relativbewegungen und hohen Drehmomentübertragungen zwischen dem Grundkörper und dem Nutenschaft des darin eingesetzten Werkzeuges. Die Schlagenergie ist selbst bei keinen Bohr- und Schlaghämmern ist oft so groß, dass besondere technische Maßnahmen erforderlich werden, um dem Verschleiß der Werkzeughalterung entgegenzuwirken.On the one hand, there is the demand for a simple, cost-effective manufacturability of the tool holder and, on the other hand, the requirement for low wear. Experience has shown that tool holders wear primarily in the area of the rotational engagement webs and in the tool guide as a result of the relative movements and high torque transmissions between the base body and the grooved shaft of the tool inserted therein. The impact energy is often so great even with no drills and impact hammers that special technical measures are required to counteract the wear of the tool holder.

Der Erfindung liegt daher die Aufgabe zu Grunde, eine Werkzeughalterung der eingangs genannten Art anzugeben, die so beschaffen ist, dass sie einerseits mit möglichst geringem Aufwand herstellbar ist und andererseits der darin auftretende Verschleiß möglichst gering ist.The invention is therefore based on the object to provide a tool holder of the type mentioned, which is such that it can be produced on the one hand with the least possible effort and on the other hand, the wear occurring therein is minimized.

Aus der EP 476387 A ist eine gattungsgemäße Werkzeughalterung bekannt.From the EP 476387 A is a generic tool holder known.

Vorteile der ErfindungAdvantages of the invention

Die genannte Aufgabe wird mit den Merkmalen des Anspruchs 1 gelöst. Diese Maßnahme erlaubt es, den Grundkörper aus einem gut zerspanbaren Stahl zu fertigen, für die Aufnahmehülse aber einen möglichst verschleißfesten gehärteten Stahl zu wählen. Die Aufnahmehülse kann z. B. durch Rundkneten oder Fließpressen oder Sintern oder im Feingussverfahren aus verschleißfestem Stahl wirtschaftlich hergestellt werden.The above object is achieved with the features of claim 1. This measure makes it possible to produce the base body from a good machinable steel, but to choose the receiving sleeve as possible a wear-resistant hardened steel. The receiving sleeve can, for. B. by swaging or extrusion or sintering or in Precision casting process made of wear-resistant steel can be produced economically.

Vorteilhafte Weiterbildungen der Erfindung gehen aus den Unteransprüchen hervor.Advantageous developments of the invention will become apparent from the dependent claims.

Damit der mindestens eine Verriegelungskörper in die Nut am Werkzeugschaft, der in die Aufnahmehülse eingesetzt ist, eindringen kann, ist die Aufnahmehülse mit mindestens einer Aussparung versehen, welche z. B. in einem Fräsarbeitsgang hergestellt werden kann.So that the at least one locking body can penetrate into the groove on the tool shank, which is inserted into the receiving sleeve, the receiving sleeve is provided with at least one recess, which z. B. can be produced in a milling operation.

Vorzugsweise ist im Innern der Aufnahmehülse mindestens ein Drehmitnahmesteg angeformt, welcher in eine Nut am Werkzeugschaft eingreift. Dieser Drehmitnahmesteg kann z. B durch Fließpressen oder Hämmern in der Aufnahmehülse herausgeformt werden.Preferably, at least one rotary driving web is formed in the interior of the receiving sleeve, which engages in a groove on the tool shank. This rotary strut can z. B are formed by extrusion or hammering in the receiving sleeve.

Eine weitere zweckmäßige Weiterbildung der Aufnahmehülse besteht darin, dass sie an ihrem der Eintrittsöffnung für das Werkzeug zugewandten Ende einen Bund aufweist, der einen axialen Anschlag am Grundkörper bildet. Dadurch erhält die Aufnahmehülse einen besonders sicheren Sitz in axialer Richtung.Another expedient development of the receiving sleeve is that it has at its the inlet opening for the tool end facing a collar, which forms an axial stop on the body. As a result, the receiving sleeve receives a particularly secure fit in the axial direction.

Eine besonders gute kraftschlüssige Verbindung zwischen der Aufnahmehülse und dem Grundkörper wird dadurch erreicht, dass die Aufnahmehülse mit dem Grundkörper durch Hartlötung verbunden wird. Bei einer Aufnahmehülse mit einem stirnseitigen Bund ist es zweckmäßig, im Bereich dieses Bundes im Grundkörper eine Aussparung zur Aufnahme von Hartlötmaterial vorzusehen.A particularly good frictional connection between the receiving sleeve and the base body is achieved in that the receiving sleeve is connected to the main body by brazing. In a receiving sleeve with a frontal collar, it is expedient to provide a recess for receiving brazing material in the region of this collar in the main body.

Vorteilhafterweise ist der Grundkörper mit mindestens einem Verriegelungskörper versehen, der in eine am Schaftende des Werkzeugs vorhandene Nut einführbar und von einem Sperrelement in seiner Verriegelungsstellung gehalten ist, welches über das Betätigungselement in eine den Verriegelungskörper radial freigebende Stellung führbar ist.Advantageously, the base body is provided with at least one locking body, which in a shaft end of the Tool existing groove is inserted and held by a locking element in its locking position, which is feasible via the actuating element in a radially releasing the locking body position.

Durch den erfindungsgemässen Einsatz einer verschleißfesten Aufnahmehülse wird eine hohe Rundlaufgenauigkeit des Werkzeuges in der Werkzeughalterung gewährleistet.The inventive use of a wear-resistant receiving sleeve ensures a high concentricity of the tool in the tool holder.

Zeichnungdrawing

Anhand zweier in der Zeichnung dargestellter Ausführungsbeispiele wird nachfolgend die Erfindung näher erläutert.Es zeigen:

  • Figur 1 einen Längsschnitt durch eine Werkzeughalterung mit einer gesonderten Aufnahmehülse für das Werkzeug und
  • Figur 2 einen Längsschnitt durch eine Werkzeughalterung mit einer einen stirnseitigen Bund aufweisenden Aufnahmehülse.
Based on two embodiments shown in the drawings, the invention is explained in more detail below.
  • FIG. 1 a longitudinal section through a tool holder with a separate receiving sleeve for the tool and
  • FIG. 2 a longitudinal section through a tool holder with a front collar having receiving sleeve.

Beschreibung von AusführungsbeispielenDescription of exemplary embodiments

Die Figur 1 zeigt ausschnittweise einen Querschnitt durch eine Werkzeughalterung 10, die z. B. an einer drehenden und/oder schlagenden Handwerkzeugmaschine angeordnet ist. Diese Werkzeughalterung 10 dient zur Aufnahme von Werkzeugen mit einem Nutenschaft. Die Werkzeughalterung 10 besitzt einen Grundkörper 12, in dem ein radial verschiebbarer Verriegelungskörper, im Ausführungsbeispiel eine Verriegelungskugel 14, gelagert ist. Diese Verriegelungskugel 14 ist in eine am Schaftende des Werkzeugs (in der Zeichnung nicht dargestellt) vorhandene Nut einführbar und wird von einer in Grenzen axial beweglichen Sperrhülse 16 und einer Haltehülse 18 in ihrer Verriegelungsstellung gehalten. Die Sperrhülse 16 ist über die Haltehülse 18 mit einer Druckfeder 20 in Richtung ihrer Sperrstellung belastet. Die Druckfeder 20 ist maschinenseitig am Grundkörper 12 abgestützt. Ebenfalls ist die Sperrhülse 16 am Grundkörper 12 abgestützt.The FIG. 1 shows a detail of a cross section through a tool holder 10, the z. B. is arranged on a rotating and / or beating hand tool. This tool holder 10 is used to hold tools with a Nutenschaft. The tool holder 10 has a base body 12, in which a radially displaceable locking body, in the exemplary embodiment, a locking ball 14, is mounted. This locking ball 14 is insertable into a groove on the shaft end of the tool (not shown in the drawing) and is provided by a limited axially movable locking sleeve 16 and a retaining sleeve 18 in their Locking position held. The locking sleeve 16 is loaded via the retaining sleeve 18 with a compression spring 20 in the direction of its blocking position. The compression spring 20 is supported on the machine body 12 on the base body. Also, the locking sleeve 16 is supported on the base body 12.

In der Verriegelungsstellung der Verriegelungskugel 14 überdeckt die Sperrhülse 16 die Verriegelungskugel 14 radial, und die Haltehülse 18 sichert die Verriegelungskugel 14 in axialer Richtung. Beim Einschieben des Werkzeugs (z. B. Bohrer, Meißel etc.) wird die Verriegelungskugel 14 durch das Schaftende des Werkzeugs in einer Ausnehmung 22 des Grundkörpers 12 in Einführrichtung des Werkzeugs bewegt. Die Haltehülse 18 wird über die Verriegelungskugel 14 gegen die Druckfeder 20 verschoben, wodurch zwischen der Sperrhülse 16 und der Haltehülse 18 ein Freiraum entsteht, in den die Verriegelungskugel 14 radial nach außen ausweichen kann. Ist nun das Werkzeug soweit in die Werkzeughalterung 10 eingeschoben, dass seine am Schaftende vorhandene Nut unter der Verriegelungskugel 14 liegt, verschiebt die vorgespannte Druckfeder 20 die Haltehülse 18 in ihre Ausgangsstellung und drückt die Verriegelungskugel 14 in die Nut des Werkzeugs.In the locking position of the locking ball 14, the locking sleeve 16 covers the locking ball 14 radially, and the retaining sleeve 18 secures the locking ball 14 in the axial direction. When inserting the tool (eg drill, chisel etc.), the locking ball 14 is moved by the shaft end of the tool in a recess 22 of the base body 12 in the insertion direction of the tool. The retaining sleeve 18 is displaced over the locking ball 14 against the compression spring 20, whereby a clearance is created between the locking sleeve 16 and the retaining sleeve 18, in which the locking ball 14 can escape radially outward. Now, if the tool as far inserted into the tool holder 10, that its existing on the shaft end groove is below the locking ball 14, the biased compression spring 20 moves the retaining sleeve 18 in its initial position and presses the locking ball 14 in the groove of the tool.

Um das Werkzeug wieder aus der Werkzeughalterung 10 entnehmen zu können, ist ein Entriegelungsmechanismus vorgesehen, der aus einer Betätigungshülse 24 besteht, die auf dem Grundkörper 12 in axialer Richtung verschiebbar gelagert ist. Zum Entriegeln wird mit der Betätigungshülse 24 die Sperrhülse 16 gegen die Haltehülse 18 und gegen die die Haltehülse 18 belastende Druckfeder 20 verschoben, so dass die Verriegelungskugel 14 radial nach außen ausweichen und das Werkzeug entnommen werden kann. Danach drückt die Druckfeder 20 die Haltehülse 18, die Sperrhülse 16, die Verriegelungskugel 14 und die Betätigungshülse 24 in ihre Ausgangsstellungen zurück.To remove the tool again from the tool holder 10, an unlocking mechanism is provided, which consists of an actuating sleeve 24 which is slidably mounted on the base body 12 in the axial direction. To unlock the locking sleeve 16 is moved with the actuating sleeve 24 against the retaining sleeve 18 and against the retaining sleeve 18 loading compression spring 20 so that the locking ball 14 dodge radially outward and the tool can be removed. Thereafter, the compression spring 20 presses the retaining sleeve 18, the locking sleeve 16, the locking ball 14 and the actuating sleeve 24 in their initial positions.

Abweichend von dem dargestellten Ausführungsbeispiel kann die Werkzeughalterung 10 mit jeder anderen Art von Verriegelungsmechanismus ausgestattet sein.Notwithstanding the illustrated embodiment, the tool holder 10 may be equipped with any other type of locking mechanism.

An dem Grundkörper 12 ist am werkzeugseitigen Ende eine Staubschutzkappe formschlüssig über eine Rastverbindung 28 befestigt, die den Bereich des Verriegelungsmechanismus werkzeugseitig gegen Staub abdichtet.On the base body 12, a dust protection cap is fastened on the tool-side end in a form-fitting manner via a latching connection 28, which seals the region of the locking mechanism against dust on the tool side.

In der Figur 1 ist noch ein Döpper 30 angedeutet, der maschinenseitig in den Grundkörper 12 hineinragt und dazu dient, das Werkzeug in schlagende Bewegungen zu versetzen.In the FIG. 1 is still an anvil indicated 30, the machine side protrudes into the base body 12 and serves to put the tool in striking movements.

Der Grundkörper besteht aus fertigungstechnischen Gründen aus einem leicht zerspanbaren Stahl. Da ein solcher Stahl im Aufnahmebereich für das Werkzeug nicht genügend verschleißfest wäre, wird in den Grundkörper 12 in eine dafür vorgesehene Aufnahmebohrung 32 eine Aufnahmehülse 34 aus einem verschleißfesten harten Stahl eingesetzt. Es kann sich dabei um einen Stahl handeln, der einem extra Härtungsprozess unterzogen worden ist.The basic body consists of manufacturing reasons of an easily machinable steel. Since such a steel would not be sufficiently wear-resistant in the receiving area for the tool, a receiving sleeve 34 made of a wear-resistant hard steel is inserted into the base body 12 in a receiving bore 32 provided for this purpose. It can be a steel that has undergone an extra hardening process.

Um eine kraftschlüssige Verbindung zwischen der Aufnahmehülse 34 und dem Grundkörper 12 herzustellen, ist in die Aufnahmebohrung 32 zwischen der Aufnahmehülse 34 und dem Grundkörper 12 ein Hartlötmaterial eingefügt, das nach einem Lötprozess die Aufnahmehülse 34 mit dem Grundkörper 12 verbindet. Die besondere Härtung der Aufnahmehülse 34 kann auch mit der nach dem Hartlötprozess vorhandenen Löthitze erfolgen.In order to produce a frictional connection between the receiving sleeve 34 and the main body 12, a brazing material is inserted into the receiving bore 32 between the receiving sleeve 34 and the base body 12, which connects the receiving sleeve 34 with the base body 12 after a soldering process. The special hardening of the receiving sleeve 34 can also take place with the soldering heat present after the brazing process.

Als Material für den Grundkörper 12 kann z. B. 16MnCrS5 oder 9SMn28K verwendet werden, und die Aufnahmehülse 34 kann z. B. aus HSS oder 100Cr6 bestehen.As a material for the main body 12 z. B. 16MnCrS5 or 9SMn28K are used, and the receiving sleeve 34 may, for. B. consist of HSS or 100Cr6.

In der Aufnahmehülse 34 ist mindestens ein Drehmitnahmesteg 38 angeformt, der in eine am Ende des Werkzeugschaftes vorhandene Nut eingreift und somit die Drehbewegung des Grundkörpers 12 auf eine Drehbewegung des Werkzeugs überträgt. Dadurch, dass die Aufnahmehülse 34 mit dem Drehmitnahmesteg aus einem harten Stahl besteht, wird die Verschleißanfälligkeit insbesondere des Drehmitnahmesteges, der einer hohen mechanischen Belastung ausgesetzt ist, stark vermindert.In the receiving sleeve 34 at least one rotary driving web 38 is formed, which engages in an existing at the end of the tool shank groove and thus transmits the rotational movement of the base body 12 to a rotational movement of the tool. The fact that the receiving sleeve 34 is made of a hard steel with the rotary driving web, the susceptibility to wear, in particular of the rotary driving web, which is exposed to a high mechanical load, greatly reduced.

Damit die im Grundkörper 12 eingesetzte Verriegelungskugel 14 in die im Werkzeugschaft vorgesehene Nut eindringen kann, muss die Aufnahmehülse 34 unterhalb der Ausnehmung 22 des Grundkörpers 12 mit einer Aussparung 40 versehen sein.In order for the locking ball 14 inserted in the base body 12 to be able to penetrate into the groove provided in the tool shank, the receiving sleeve 34 must be provided with a recess 40 below the recess 22 of the base body 12.

Die Aussparung 40 und der Drehmitnahmesteg 38 können vor dem Einsatz der Aufnahmehülse 34 in die Aufnahmebohrung 32 des Grundkörpers 12 z. B. durch Fräsen bzw. geeignete Verformverfahren hergestellt werden. Die Aussparung 40 und der Mitnahmesteg 38 können aber auch erst dann erstellt werden, wenn die Aufnahmehülse 34 bereits in die Aufnahmebohrung 32 eingelötet ist. Dabei können die Ausnehmung 22 im Grundkörper 12 und die Aussparung 40 in der Aufnahmehülse 34 in einem Arbeitsgang, z. B. durch Fräsen, hergestellt werden. Auch können durch Räumprozesse in der bereits in die Aufnahmebohrung 32 eingelöteten Aufnahmehülse 34 nachträglich Toleranzbearbeitungen vorgenommen werden.The recess 40 and the rotary driving bar 38 may be prior to the use of the receiving sleeve 34 in the receiving bore 32 of the base body 12 z. B. be made by milling or suitable deformation. However, the recess 40 and the driving bar 38 can also be created only when the receiving sleeve 34 is already soldered into the receiving bore 32. In this case, the recess 22 in the base body 12 and the recess 40 in the receiving sleeve 34 in one operation, for. B. by milling. Also can be made by broaching processes in the already soldered into the receiving bore 32 receiving sleeve 34 subsequently tolerance machining.

In der Figur 2 ist eine Variante zum Ausführungsbeispiel in Figur 1 dargestellt. Im Wesentlichen gleichbleibende Bauteile sind grundsätzlich in den beschriebenen Ausführungsbeispielen mit den gleichen Bezugszeichen beziffert. Ferner kann bezüglich gleichbleibender Merkmale und Funktionen auf die Beschreibung des Ausführungsbeispiels in Figur 1 verwiesen werden. Das in der Figur 2 dargestellte Ausführungsbeispiel der Werkzeughalterung unterscheidet sich von dem in der Figur 1 dargestellten Ausführungsbeispiel dadurch, dass die Aufnahmehülse 34 an ihrem der Eintrittsöffnung für das Werkzeug zugewandten Ende mit einem Bund 42 versehen ist, der einen axialen Anschlag an einer dafür vorgesehenen stirnseitigen Anschlagfläche 44 am Grundkörper 12 bildet. Hierdurch erhält die Aufnahmehülse 34 einen besonders sicheren axialen Sitz im Grundkörper 12. Die Anschlagfläche 44 kann mit einer z. B. radial umlaufenden Aussparung 46 versehen werden, in die zur Fixierung des Bundes 42 an der Anschlagfläche 44 ein Hartlötmaterial eingebracht werden kann.In the FIG. 2 is a variant of the embodiment in FIG. 1 shown. Substantially identical components are basically numbered in the described embodiments with the same reference numerals. Furthermore, with regard to features and functions that are the same, the description of the exemplary embodiment can be found in FIG. 1 to get expelled. That in the FIG. 2 illustrated embodiment of the tool holder differs from that in the FIG. 1 illustrated embodiment in that the receiving sleeve 34 is provided at its the inlet opening for the tool end facing with a collar 42 which forms an axial stop on a frontal stop surface 44 provided on the base body 12. As a result, the receiving sleeve 34 receives a particularly secure axial seat in the base body 12. The stop surface 44 may be provided with a z. B. radially encircling recess 46 are provided, in which for fixing the collar 42 on the stop surface 44, a brazing material can be introduced.

Claims (7)

  1. Tool mounting for a portable power tool having a rotating and/or percussive drive, wherein the tool mounting (10) has a basic body (12) with means for accommodating a tool having a grooved shank, the basic body (12) is provided with a locking mechanism with which the tool can be arrested in the basic body (12) and which comprises a radially displaceable locking body, in particular a locking ball (14), and an actuating element (24) for unlocking the tool in the basic body (12) is provided, wherein the means for accommodating the tool consist of a locating sleeve (34) inserted into the basic body (12), characterized in that the locating sleeve (34) is made of a harder material than the basic body (12) and has an aperture (40) so that the locking body canpenetrate into a groove provided on the grooved shank.
  2. Tool mounting according to Claim 1, characterized in that the locating sleeve (34) is made of a hardened steel.
  3. Tool mounting according to Claim 1, characterized in that at least one rotary driving web (38) which engages in a groove on the tool shank is integrally formed in the locating sleeve (34).
  4. Tool mounting according to Claim 1, characterized in that, at its end facing the inlet opening for the tool, the locating sleeve (34) has a collar (42) which forms an axial stop at the basic body (12).
  5. Tool mounting according to Claim 1, characterized in that the locating sleeve (34) is connected to the basic body (12) by brazing (36).
  6. Tool mounting according to Claims 1 and 4, characterized in that the basic body (12), in the region of a front-end stop surface (44) for the collar (42) of the locating sleeve (34), is provided with a recess (46) for receiving brazing material.
  7. Tool mounting according to Claim 1, characterized in that the basic body (12) is provided with at least one locking body (14) which can be inserted into a groove at the shank end of the tool and is held in its locking position by a blocking element (16) which can be directed via the actuating element (24) into a position radially releasing the locking body (14).
EP01964910A 2000-09-08 2001-08-16 Tool mounting for a hand machine tool Expired - Lifetime EP1326736B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10044387A DE10044387A1 (en) 2000-09-08 2000-09-08 Tool holder for a hand machine tool
DE10044387 2000-09-08
PCT/DE2001/003148 WO2002020224A1 (en) 2000-09-08 2001-08-16 Tool mounting for a hand machine tool

Publications (2)

Publication Number Publication Date
EP1326736A1 EP1326736A1 (en) 2003-07-16
EP1326736B1 true EP1326736B1 (en) 2009-04-01

Family

ID=7655470

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01964910A Expired - Lifetime EP1326736B1 (en) 2000-09-08 2001-08-16 Tool mounting for a hand machine tool

Country Status (7)

Country Link
US (1) US6854740B2 (en)
EP (1) EP1326736B1 (en)
JP (1) JP2004508213A (en)
CN (1) CN1298502C (en)
BR (1) BR0113723A (en)
DE (2) DE10044387A1 (en)
WO (1) WO2002020224A1 (en)

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Also Published As

Publication number Publication date
CN1298502C (en) 2007-02-07
US6854740B2 (en) 2005-02-15
EP1326736A1 (en) 2003-07-16
BR0113723A (en) 2003-07-22
CN1430547A (en) 2003-07-16
US20030137114A1 (en) 2003-07-24
DE10044387A1 (en) 2002-04-04
JP2004508213A (en) 2004-03-18
DE50114809D1 (en) 2009-05-14
WO2002020224A1 (en) 2002-03-14

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